Jar-closure.



C. HAMMER.

JAR CLOSURE.

APPLICATION FILED Nov. Io. I9Is.

Patented 001;. 30, 1917.

] wuawloz Charles Ham mer. attoznm UNITED srATEs PATENT oEEroE.

cHAELEs HAMMER, or UEENs, NEW Yoan, AssIGNoE, BY DIEEcT AND MEsNEASSIGNMENTS, 'ro AMERICAN METAL CAP co., 0E BROOKLYN, NEW YoEK.

To all whom z't may concern:

Be it known that I, CHARLES HAMMER, a citizen of the United States,residing at Queens, in the county of Queens and State of New York, haveinvented certain new and useful Improvements in J ar- Closures, of whichthe following is a specification.

This invention relates to the covers or closures vfor jars, wherein itis necessary to provide a type of hermetic sealof the closure on the topof the jar, to effectually prevent entrance of the air, as well as toretain the contents of the vessel. v

The object of the present invention is to provide a closure that will besecurely retained on a jar top that has a ysubstantially straight outerwall, and isnot provided with a Sealing groove and wherein acompressible washer of non-metallic material, 'such as a composition ofthe nature of rubber, will be strongly compressed between the closureand the jar wall, but without engagement of the closure with the jar.

A further object is to provide such a form of closure that will besecured on the jar by the application .of downward pressure' on theprojecting lower portion of the closure that will produce an inwardlyprojecting annular portion to strongly compress the washer against thejar.

In the accompanying drawing illustrating one embodiment of my invention,Figure l is a top or planview. Fig. 2 shows in vertical section, theclosure as applied to the top of a jar; and Fig. 3 is a partial enlargedview of the closure on the jar.

The closure or cap is preferably made of thin reformable sheet metal,and comprises a top central portion 6, preferably flat, that is providedwith a ange portion 7 extending downwardly in a slightly divergent coni-Cal form; the flange being connected with the-central portion 6 by anarch portion 8. The iange is bent abruptly outward and upward to form anupwardly facing channel portion 9. The flange is then bent or rolleddownwardly and inwardly to form a bead 10 as shown, 'which bead issubstantially 'circular in cross 'section and connected with thedivergent conical portion 7 by the abrupt bend 9 as clearly set forth inFig. 2.

A washer is placed inside ofthe flange portion of the closure and ispreferably held therein by the bead. As shown, I provide a comparativelythin and at ring washer 12 Specication of Letters iatent.

. Patented Oct. 30, 1917.

Application led November 10, 1916. Serial No. 130,513.

of compressible sealing material, preferably in the nature of a rubbercomposition. This washer engages the inner Wall of the ange portion 7,and has its lower edge 13 secured inside of the bead 10 as indicated inFig. 2

whereby the washer is retained in proper `closure it is preferablysecured by the use of a head or chuck of annular form, as indicated at16 in Fig. 2. This chuck member is moved vertically downward relative tothe closure and jar, and its curved face 17 will irst engage the upperportion of the bead 10, that will deiect the bead downwardly andinwardly. This will draw the lower portion of the conical flange 7inward toward the jar wall, and will cause the abrupt bend 9 to projecthorizontally inward as indicated at 17 in Fig. 3. The upper portion ofthe curve 17 will engage the flange wall 7 at the latter part of thebending operation and deflect it inwardly, as shown in Fig. 3. This willstrongly compress the washer l2 and the bend 9 will project into thewasher. The downward pressure will also compress the upper part of thewasher and slightly compress it between the top edge 15 of the jar, andthe arch portion Spf the closure, as shown in Fig. 3.

By this arrangement-it will be understood that a very tight and strongseal is provided by the compression of the washer from the inwardlyprojecting bent vportion 9. The washer will extend some distance belowthis bend, and will have its lower portion between the edge ofthe beadand the jar, and will thus practically protector cover-the metal edge ofthe bead that is not closed by reason of its holding the washer. Theouter wall of the jar top 14 is shown as substantially cylindrical butobviously it might have a slight conical taper, either upwardly ordownwardly, yet constitute what is a straight-walled jar top. This termis used to distinguish from said jar or bottle tops walled jar top.Since the metal portion of the closure does not engage the jar, the capcan be removed by inserting a sharp tool into thewasher to pry it oii".By reason l of the yielding nature of the composition washer, and themetal of the closure not engaging the jar wall, considerable variationin size of the jar can be accommodated, as well as unevenness or flawsin such wall, as the composition will be forced into the same and form ahermetic seal.

Having thus described my invention, what I claim is 1. The combinationof a jar closure of thin reformable sheet metal composed of a toprand anannular side fiange of slightlyv divergent conical pform, the ange beingabruptly bent outward and upward, and

then bent downward and inward into the.

form of a roll or bead that adjoins said abrupt bend, and acomparatively thin and fiat ring washer of compressible sealing materialhaving the lower edge secured in said bead and which extends inward andupward in contact with the inner face of the flange, whereby theinsertion into the closure of the jar top with merely downward ressureon the bead portion, will cause the cad antenas to be forced downwardand inward an the abrupt bend connecting the bead 1 be caused to projectinwardly beyond they reformable sheet metal composed of a to and anannular side liange of slightly d1 vergent conical form that connectswith the top byran arched portion adapted to co-act with the rounded topof a jar, the fiange being abruptly bent outward and ,upward and thenbent downward and inward into the'form of a roll or bead that adjoinssaid abrupt bend, and a comparatively thin and Hat ring washer ofcompressible sealing material having the lower edge secured in saidbeadand which extends inward and upward in contact with the inner face ofthe flange,

whereby the insertion into the closure of the jar top with merelydownward pressure on the projecting bead portion, will-cause v

